Mismatch between 2.69 and 2.72 interfaces for Video Sequence Editor window
Found the solution.  Click on the "Current editor type for this area" icon (see picture below) and select "Properties" from the menu that comes up.  The display will change to the window type shown in the tutorial above.



Here's a detailed capture of the resulting new Properties window:



(Blender... powerful software, but what a learning curve!)